@Alexd1985, thank you for your comment, I already got the reward before creating the question
cardano-my-node$ cardano-cli query stake-address-info --address $(cat stake.addr) --mainnet
output:
[
{
"address": "stake1u8yncg4y9fzyr5vckqwgqh7vs5q2d7y8sf3fwmwa6synmpqpruaap",
"rewardAccountBalance": 0,
"delegation": null
}
]
Output from cardanoscan:
Do you have any hint for me?